首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
It’s often said that plants hidden in the tangle of the Amazonian rain forest may harbor an undiscovered cancer cure. John Richa
It’s often said that plants hidden in the tangle of the Amazonian rain forest may harbor an undiscovered cancer cure. John Richa
admin
2013-06-02
39
问题
It’s often said that plants hidden in the tangle of the Amazonian rain forest may harbor an undiscovered cancer cure. John Richard Stepp thinks the same can be said for the world’s weeds.
In a study published last year, Stepp, a professor at the University of Florida in Gainesville, looked at the ingredients of common drugs sold at local pharmacies. Of the 101 primarily plant-based health remedies he examined, Stepp estimated that the main ingredient in about a third of the drags was a weed.
"Those are Fairly conservative numbers too," he added. "It is actually more than a third. We cut quite a few off the list, because they weren’t quite weedy enough, in my view."
To be "weedy enough" to meet Stepp’s criteria, plants had to be fast-growing and soft-tissued—unlike trees, for example, which are slow-growing and have woody tissues. Stepp also limited his definition of weeds to plants that thrive in disturbed areas, like farms or clearings, without being deliberately planted.
Stepp said his tally of common weed-based drags was ten times higher than expected. There are about 8,000 weeds known to science. That figure comprises only about 3 percent of the world’s 250,000 described plants.
Phyllis Coley is a biologist at the University of Utah who conducts drug-discovery research in the Panamanian tropical rain forests. She said Stepp’s finding is "provocative."
Coley noted that weedy plants have long been a source of traditional medicines. A key question, she said, is, Why?
"Perhaps this is because weeds were shown to work better," she said. "But I would also suggest that weedy plants would be much more readily available, as they grow in association with human disturbance and are therefore more likely to be experimented with and developed into medicines."
Meanwhile Stepp said his 2004 study results suggest that, in addition to exploring the rain forest for medicinal plants, it makes sense to look at the 8,000 or so weeds that grow closer to home.
The anthropologist doesn’t think drag companies share that view. "The difference between wanting to find new medicines and wanting to find new medicines to make a profit is a very wide gulf," he said.
Regardless of whether new drugs are developed from weeds, Stepp said weed research could lead governments to respect and promote traditional medicinal practices, especially in parts of the world with limited access to modem health care facilities.
Coley took a(n) ______ attitude towards Prof. Stepp’s studies.
选项
A、enthusiastic
B、positive
C、neutral
D、questioning
答案
D
解析
见文章第6段,在Coley看来,Stepp的研究结果是“引起争论的”。
转载请注明原文地址:https://kaotiyun.com/show/0r67777K
0
大学英语六级
相关试题推荐
______(要么是你,要么是我弄错了)thedeparturetimeofthetrain.
Bringingupchildrenisahardwork,andyouareoftentoblameforanybadbehaviorofyourchildren.Ifso,JudithRichHarris
A、MoreChineseapplicantsfailtofindajob.B、Theaptitudetestisbecomingworldwidepopular.C、Applicantsshouldnotactas
Forthispart,youareallowed30minutestowriteashortessayentitledSayNotoDrunkDriving.Youshouldwriteatleast150
A、BecausehewasfamousforhisviewtokeeptheUnionbyforce.B、Becausehewasfamousforhisanti-slaveryviews.C、Becauseb
Theessentialproblemofmaninacomputerizedageremainsthesameasithasalwaysbeen.Thatproblemisnot【B1】______howto
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnotvisitedbytourists.Thetravelbusinessoffersav
A、Whenthesystemisdown.B、Whennewlinksaresetup.C、WhentheURLisreused.D、Whentheserverisrestarted.C就Facebook来说,公
Threeweeksago,theschoolsysteminAlexandria,Va.,announcedthat80%ofthestudentswhowereabouttograduatefromT.C.
Wheninterviewed.______(这位著名的科学家将自己的成功归因于勤奋工作).
随机试题
在诉讼时效期间的最后6个月内,因法定障碍不能行使请求权的,诉讼时效中止,自中止时效的原因消除之日起满6个月,诉讼时效期间届满。()
Thispassageismainlyabout______.Accordingtothepassage,whichofthefollowingisNOTtrue?______.
设备工程成本控制的主体是()。
为确保企业财务目标的实现下列各项中可用于协调所有者与经营者矛盾的措施有()。
运用成本模型计算最佳现金持有量时,下列公式中,正确的是()。
下列关于问题业务的各项说法中,不正确的是()。
以个体认识论为基础提出教学理论的教育家是()。
设f’(x)=arcsin(x-1)2及f(0)=0,求∫01f(x)dx.
WhatwastheAmericaneconomicsystembasedonuntil1930?
Sinceancienttimesithasbeenknownthatyourwordisacausesetinmotion.Infact,theuniverseitselfisclaimedtohavee
最新回复
(
0
)